👉 Back fluid, also known as intra-articular fluid, is a clear, colorless liquid that fills the space within joint cavities, particularly around synovial joints. It plays a crucial role in lubricating the joint, reducing friction between the articular cartilage surfaces during movement, and absorbing shock. Produced by the synovial membrane lining the joint capsule, back fluid also contains nutrients and waste products essential for maintaining cartilage health. When there's an imbalance between fluid production and clearance, it can lead to joint pain or inflammation, as seen in conditions like arthritis.
